Samuel levitt



S. LEVITT.

PI'PE CONNECTION.

APPLlcATIoN msn MAY3.1919.

Patel'xtedSept. 9, 1919.

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NN N1 N i @Ng l Irll' f A A n Q gr of nvm/fof? TTOHNEY f vided, while the other end 'unirse .s'rATns PATENT onirica.

SAM-JEL Lnvrrr, or BROOKLYN,

COMPANY, rnc., or New Yoan,

NEWYORK, ASSIGNOR'TO UNITED METAL HOSE y N. Y., A CORPORATION OF yNEWT YORK.

PIPE CONNECTION.

Patented Sept. 9,1919.

Application filed May 3, 1919. Serial No. 294,365.

To all whom it' may concern Be it known that l, SAMUEL Lnvrrr, a citizen of Russia,'residing inthe borough oi Brooklyn, city of New York, county of Kings, and State ot New York, have invented certain new and useful Improvements inV Pipe Connections, oi which t ie following 1s a speeilication.

This invention relates to a pipe connection or coupling adapted to be attached to the end of a flexible `pipe or hose for connecting the same to another pipe section, or to whatever the flexible pipe is improved coupling is especially adapted for use in connection with covered flexible metal tubing, in which case provision is made for a tightly sealed `ioint with the inner member of the tubing, and also ior the proper re- Veeption ofthe end portion ofthe armor or covering. My eouplingmayralso be used however,with uncovered metal tubing or with flexible tubing of rubber or the like, either covered or uncovered.-

ln the accompanying drawings, which 'form a part of this specification, and which illustrate one preferred Jform` oi the inven tion, Figure ,1 is a longitudinal sectional view showing such form applied to a flexible metal tube;

Fig. 9. is a similar view showing the coupling applied to a rubber hose;

Fig?) is a cross section on Fig. 1. i

Figfl is an outside view of the assembly shown in Fig. 1.

Referring to the drawings in detail, the j coupling in its preferred form comprises a metal sleeve 1, internally threaded for a part of its length, as indicated at 2, and having an enlarged cylindrical bore 3 extending 'from its rear end throughout a con siderable part of the length of At that end oi the sleeve which is internally threaded an external threadfl is pro of the sleeve is provided with an externally threaded, taf pered portion 5. This tapered `threaded. portion o i the` sleeve is preferably split at a plurality olf points, as inc ic'ated at 6, so as to permit this part of the sleeve to be compressed somewhat by the action of a clamping nut T screwing on thread. Adapted to screw on the threaded portion 4l on the front end of the sleeve, is a coupling nut 8, having an internal shoulder 9 intermediate to be connected. My

line "33 of the sleeve.V

- readily attached the tapered of its length, and having a bore 10 oit sufiicient diameter to receive the inner end of the metal tube with'which the coupling is adapted to be used. The front end of the coupling nut is provided with an-externally threaded spigotwconnection 11 or is otherwise suitably formed for connection with any desired duct member or the like..` A soft packing 12 of asbestos, rubber or other suitable inaterialis provide between the end of the sleeve 1, andthe shoulder 9 of the coupling nut, between. which surfaces it isadapted to be compressed when the nut is screwed on the sleeve.

`Figs. 1 and 3 show the ap lication of the coupling to an armored or s eathed flexible metal tube "15. The tube which is illus trated asl a seamless thin metal tube having a spiral corrugation to giveflexibility, al-

though it will be understood that the coupling may be used with any other typeoi'i tube, such as a tube wound strips, in any well known manner. The tube 15 is shown as provided with a cover, sheath or armor 16 which is illustrated as formed of braided metallic strips or wires, although, as will be understood, the couplin may be used with a tube having any, ot er su`table form of coverinfr. When utilized with a tubing of the character described, the coveringis cut off somewhat shorter than the inner metallic` tubing and the sleeve 1 is slipped over the end of the tubing, the covering being received within the bore B while the threads 2 are screwed on the spiral corrugations of the inner tube. -The coupling nut 8 is screwed firmly on the threaded portion 4 of the sleeve and compresses the soft packing 12 against the inner tube and into the corrugations thereof, so as to 'forni a tightly sealed joint which effectually prevents eakage The .nut is screwed up so as to compress the rear split portion of the sleeve tight-ly upon the casing or armor, thereby holding the latter firmly in place, and forming a good linish, without requiring the use of solder. lt .vill thus be seen that the coupling may be very in the manner above de scribed', and that a firm and tight connection with both the inner tube and the easing may be established quickly and without the neces sity of performing any difficult operation.

In Fig. 2.1 have soldering or other shown the application 'formed 'of spirally 4 h' i" "f ion of the coupling to a hose of rubber or other flexible material. lVhen the couplingis applied to such a hose a thiinble 2O is used in connection with it, which is slightl tapered on the outside and is forced into t e end of the Lose 21. The sleeve l `is lirst slipped over' the end of the hose and the threaded portion 2 engaged therewith, after which the thimble is forced in, thus compressing the rubber or flexible material into the threads. The thimble is then held in place by the application of the clamping nut 8, which also compresses the packing` 12. A packing 22 is preferably placed-in the bore l0 of the clampin against the endo the thimble. In 'some cases the packing 12 may beomitted. The split end of the sleeve is preferably drawn up close against the outer surface'of the `hose by the action of the nut'7, as already k described.l

' t screw 27.

In some cases it is desirable to attach to.l

the coupling an additionalfarmoring or reinforcing member adapted lto protect the tubing against being bent too sharply with resultantbreakage or injury.

In Figs. l and 4I have shown such reinforcement in theform of a short section of. spirally wound liexible tubing 25, one end of'which is secured to the coupling by being inserted in a bore 26,`formed for the purose, in the rear part of the clamping nut Any suitable means for securing the revinforc'ementto tlfe clampingn'ut may be employed, such, for instance, as thel rset While I have described only onepreferred form of my invention, itis to be understood that the invention is not limited to such precise form, but is capable of modification. I do not, therefore, claims to be limited to the form illustrated, any further than as particularly described therein, but I intend to cover my invention broadly in whatever form its principle may be embodied.

Having thus described claim 1. A couplingof the character described comprising a sleeve having a portion adapted to receive-and en age a metal tube, and having an enlarged ore formed therein in rear of said tube-engaging portion, said sleeve being externally threaded-at its forward'end, a coupling nut adapted to screw my invention, I

y on said externally threaded portion, and

shoulder' therein, and a having an internal be compressed between packing adapted to the forward rend `of the sleeve and said` shoulder.

2. A coupling of the character described comprising a sleeve having a portion adapted to receive and engage a metal tube, and having an enlarged bore formed therein in rear of said tube-engaging portion. said nutv and is compressed intend the appended ing nut. screwing `on said sleeve being externally threaded at its for ward end, a coupling nut adapted to screw on said externally threaded portion, and having internal shoulders therein, and a packingadapted to be compressed between the forward end of the sleeve and said shoulder, the-rear end of the sleeve being split and provided with a tapered external thread and a clamping nut screwing `on said thread.'`

3. A coupling of the character described comprising a sleeve having an internal thread atl the forward end thereof, and a substantially cylindrical bore of larger diameter in rear' of said threaded portion, the forwardfend/bf said sleeve being externally threaded, ait/coupling nut screwing yon said y external thread on the sleeve, and having an inginterposed between the forward end of the sleeve and said shoulder and adapted to e compressed therebetween when the nut is screwed up on the sleeve.

4. In a coupling of the character described a sleeve'having a coarse internal thread extending throughout part of its length and having a substantially cylindrical t:bore of enlarged diameter in rear of said thread, a coupling nut adapted to be engaged with one end of said sleeve, the otherend of said sleeve being split and provided with an external tapered thread, and a clamping nut' screwing on said thread. I

5. The combination with a metallic tubing `comprising, a helically ribbed inner tube havinga sheath thereon terminating short of the end of the inner tube, and a coupling attached to said tubing, comprising a sleeve having an internally screwed' on the projecting end of the inner tube and having a rearwardly extending portion provided with a substantially cylindrical bore in which a part of the sheath is received, the'rear" end of the sleeve being split and being externally threaded, a' clamprear threaded end of the sleeve and acting to compress the same against the outer surface of the sheath, tie opposite end of said sleeve being externally threaded, and a coupling nut screwinor on said threaded part of the sleeve, sai coupling nut having an and having a bore extending forwardly of sai/d" shoulder into which the end of the inner tube is adapted to be received, and a packing interposed between the forward end of said sleeve and the shoulder in `said coupling nut, and adapted to be compressed b'etween said surfacesinto engagement with the outer surface of the inner tube when the coupling nut is screwed upon the sleeve.

6. In a coupling of' the character described, a sleeve having a bore adapted to receive the end of said ysleeve having'a `nutlin sorewthreaded 4 portion` internal shoulder y end of a fiexible tube, the rear Le 1mm '8 t therewith, said nut end of seid sleeve being split and provided part thereof, and a, with m1 external thread, a @humping nut screwed on, :md ifhreed, said vlenmping nut 10 having a bore in the rear part thereof, and

f the character de- :L flexible reinforcing tube having one en threaded engagemen "hzwng :L bore in the real' [lvxbkz reinforcing tube having one end secured 'm Said bore.

53 T 'In e coupling o s-erbed, a, sleeve having a here adapted to secured in seid bore. i 'eneve the end ef n exbletube, the rear SAMUEL LEVITT. 

